The Human Genome Project announced in the spring of 2001 that they had sequenced the entire human genome of three billion base pairs. How did they do it? Starting with intact chromosomes, this step-by-step activity shows how the DNA is cut into fragm...ents, cloned, and replicated, and, finally, how the sequence is detected and assembled. From the NOVA: "Cracking the Code of Life" Web site.[more]

This interactive activity from ChemThink explains the valence shell electron pair repulsion (VSEPR) theory. Understand why, within a covalently-bonded molecule, areas with a higher concentration of electrons repel each other to be as far apart as pos...sible. See how Lewis structures can be used to predict the shape of a molecule, and learn about common molecular geometries such as linear, trigonal planar, bent, tetrahedral, and trigonal pyramid.[more]

"Scientists for Better PCR" produced this Bio-Rad Music video that is filmed in the style of a celebrity benefit. The music video is a commercial for a BioRad thermocycler, which is essentially a DNA copying machine. During the song, there are jokes... about the particulars of reproducing the genetic material as well as terms students may need to become familiar. The value of the video is that the terms used provide insights into the uses of DNA and can provide students with an idea of how they could create such a learning tool.(2:14)[more]

This video discusses the origins of DNA. DNA is basis of all organic life, and is very complex. Video discusses what DNA contains, what information is in the DNA which is very complex. Steps of the DNA ladder contain four different molecules, adenine..., thymine, cytosine, guanine. Video explains how many of each there are and how to figure what the pairs are. (03:24)[more]

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